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首页> 外文期刊>Atmospheric environment >Validation of OMI tropospheric NO_2 observations during INTEX-B and application to constrain NO_x emissions over the eastern United States and Mexico
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Validation of OMI tropospheric NO_2 observations during INTEX-B and application to constrain NO_x emissions over the eastern United States and Mexico

机译：验证INTEX-B期间OMI对流层NO_2观测值的有效性，并用于限制美国东部和墨西哥的NO_x排放

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摘要

We compare tropospheric NO_2 column measurements from the Ozone Monitoring Instrument (OMI) aboard the EOS Aura satellite with coincident in situ aircraft measurements on vertical spirals over the southern United States, Mexico, and the Gulf of Mexico during the INTEX-B campaign in March 2006. Good correlation with no significant bias (r~2 = 0.67, slope = 0.99 ±0.17, n = 12) is found for the ensemble of comparisons when the aircraft could spiral sufficiently low to sample most of the NO_2 column. Urban spirals where large extrapolations were needed below the aircraft floor (1000 ft) showed poorer agreement. We use the OMI observations together with a global chemical transport model (GEOS-Chem) to estimate emissions of nitrogen oxides over the eastern United States and Mexico in March 2006. Comparison to EPA's National Emissions Inventory 1999 (NEI99) calls for a decrease in power plant emissions and an increase in on-road vehicle emissions relative to that inventory. The rise in vehicular emissions is offsetting the reduction in power plant and industry emissions. These findings are consistent with independent assessments. Our OMI-derived emission estimates for Mexico are higher by a factor of 2.0 ± 0.5 than bottom-up emissions, similar to a comparison between the recently released Mexican NEI99 inventory and the bottom-up showing that the Mexican NEI99 inventory is 1.6-1.8x higher.
机译：我们比较了EOS Aura卫星上的臭氧监测仪（OMI）对流层NO_2柱的测量结果与2006年3月INTEX-B战役期间美国南部，墨西哥和墨西哥湾上空垂直涡旋的同步原位飞机测量结果当飞机可以旋转到足够低的高度来采样大部分NO_2色谱柱时，比较的集合具有良好的相关性，没有明显的偏差（r〜2 = 0.67，斜率= 0.99±0.17，n = 12）。在飞机地板（1000英尺）以下需要大量外推的城市螺旋线显示出较差的一致性。我们将OMI观测值与全球化学迁移模型（GEOS-Chem）结合使用，以估算2006年3月美国东部和墨西哥的氮氧化物排放量。与EPA的1999年国家排放清单（NEI99）进行比较，要求降低功率相对于该清单，工厂排放量和公路车辆排放量的增加。车辆排放的增加抵消了电厂和工业排放的减少。这些发现与独立评估一致。我们对墨西哥的OMI得出的排放估算值比自下而上的排放量高2.0±0.5倍，类似于最近发布的墨西哥NEI99库存与自下而上的排放量之间的比较，表明墨西哥NEI99的存量为1.6-1.8倍更高。

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